package me.firstapp.common.utils;

import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;

import com.google.zxing.LuminanceSource;

public class BufferedImageLuminanceSource extends LuminanceSource {
	 private final BufferedImage image;  
	    private final int left;  
	    private final int top;  
	  
	    public BufferedImageLuminanceSource(BufferedImage image) {  
	        this(image, 0, 0, image.getWidth(), image.getHeight());  
	    }  
	  
	    public BufferedImageLuminanceSource(BufferedImage image, int left,  
	            int top, int width, int height) {  
	        super(width, height);  
	  
	        int sourceWidth = image.getWidth();  
	        int sourceHeight = image.getHeight();  
	        if (left + width > sourceWidth || top + height > sourceHeight) {  
	            throw new IllegalArgumentException(  
	                    "Crop rectangle does not fit within image data.");  
	        }  
	  
	        for (int y = top; y < top + height; y++) {  
	            for (int x = left; x < left + width; x++) {  
	                if ((image.getRGB(x, y) & 0xFF000000) == 0) {  
	                    image.setRGB(x, y, 0xFFFFFFFF); // = white  
	                }  
	            }  
	        }  
	  
	        this.image = new BufferedImage(sourceWidth, sourceHeight,  
	                BufferedImage.TYPE_BYTE_GRAY);  
	        this.image.getGraphics().drawImage(image, 0, 0, null);  
	        this.left = left;  
	        this.top = top;  
	    }  
	  
	      
	    public byte[] getRow(int y, byte[] row) {  
	        if (y < 0 || y >= getHeight()) {  
	            throw new IllegalArgumentException(  
	                    "Requested row is outside the image: " + y);  
	        }  
	        int width = getWidth();  
	        if (row == null || row.length < width) {  
	            row = new byte[width];  
	        }  
	        image.getRaster().getDataElements(left, top + y, width, 1, row);  
	        return row;  
	    }  
	  
	      
	    public byte[] getMatrix() {  
	        int width = getWidth();  
	        int height = getHeight();  
	        int area = width * height;  
	        byte[] matrix = new byte[area];  
	        image.getRaster().getDataElements(left, top, width, height, matrix);  
	        return matrix;  
	    }  
	  
	      
	    public boolean isCropSupported() {  
	        return true;  
	    }  
	  
	      
	    public LuminanceSource crop(int left, int top, int width, int height) {  
	        return new BufferedImageLuminanceSource(image, this.left + left,  
	                this.top + top, width, height);  
	    }  
	  
	      
	    public boolean isRotateSupported() {  
	        return true;  
	    }  
	  
	      
	    public LuminanceSource rotateCounterClockwise() {  
	        int sourceWidth = image.getWidth();  
	        int sourceHeight = image.getHeight();  
	        AffineTransform transform = new AffineTransform(0.0, -1.0, 1.0,  
	                0.0, 0.0, sourceWidth);  
	        BufferedImage rotatedImage = new BufferedImage(sourceHeight,  
	                sourceWidth, BufferedImage.TYPE_BYTE_GRAY);  
	        Graphics2D g = rotatedImage.createGraphics();  
	        g.drawImage(image, transform, null);  
	        g.dispose();  
	        int width = getWidth();  
	        return new BufferedImageLuminanceSource(rotatedImage, top,  
	                sourceWidth - (left + width), getHeight(), width);  
	    }  
}
